Susceptibility of adults of the cerambycid beetle Hedypathes betulinus to the entomopathogenic fungi Beauveria bassiana, Metarhizium anisopliae, and Purpureocillium lilacinum.

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Abstract

The cerambycid beetle Hedypathes betulinus (Klug) (Coleoptera: Cerambycidae) causes severe damage to yerba mate plants (Ilex paraguariensis (St. Hilaire) (Aquifoliales: Aquifoliaceae)), which results in large losses of production. In this study, the pathogenicity of entomopathogenic fungi of the species Beauveria bassiana (Balsamo-Crivelli) Vuillemin (Hypocreales: Cordycipitaceae), Metarhizium anisopliae sensu lato (Metschnikoff) Sorokin (Hypocreales: Clavicipitaceae), and Purpureocillium lilacinum (Thom) Luangsa-ard, Hywel-Jones, Houbraken and Samson (Hypocreales: Ophiocordycipitaceae) on yerba mate were evaluated. Fifteen isolates of B. bassiana, two of M. anisopliae, and seven of P. lilacinum on H. betulinus adults were analyzed under laboratory conditions. The raw mortality rate caused by B. bassiana isolates varied from 51.1 to 86.3%, and their LT50 values varied between 8.7 and 13.6 d. The isolates of M. anisopliae caused 69.6‒81.8% mortality, and their LT50 values varied between 7.4 and 7.9 d. In contrast, isolates of P. lilacinum were not pathogenic. M. anisopliae and B. bassiana isolates were pathogenic against H. betulinus adults, suggesting that they may be useful in biological control programs for insect pests of yerba mate.

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Author and article information

Journal

Journal ID (iso-abbrev): J Insect Sci

Title: Journal of insect science (Online)

Publisher: Oxford University Press (OUP)

ISSN (Electronic): 1536-2442

ISSN (Print): 1536-2442

Publication date (Electronic): 2014

Volume: 14

Affiliations

[1 ] Centro de Estudios Parasitológicos y de Vectores (CEPAVE-CONICET-UNLP). Boulevard 120 S/N e/61 y 62 (B1902CHX). La Plata, Buenos Aires, Argentina eleschapovaloff@yahoo.com.ar.

[2 ] Centro de Estudios Parasitológicos y de Vectores (CEPAVE-CONICET-UNLP). Boulevard 120 S/N e/61 y 62 (B1902CHX). La Plata, Buenos Aires, Argentina luis.alves@unioeste.br.

[3 ] Centro de Estudios Parasitológicos y de Vectores (CEPAVE-CONICET-UNLP). Boulevard 120 S/N e/61 y 62 (B1902CHX). La Plata, Buenos Aires, Argentina andre.fanti@gmail.com.

[4 ] Centro de Estudios Parasitológicos y de Vectores (CEPAVE-CONICET-UNLP). Boulevard 120 S/N e/61 y 62 (B1902CHX). La Plata, Buenos Aires, Argentina ralzogaray@hotmail.com.

[5 ] Centro de Estudios Parasitológicos y de Vectores (CEPAVE-CONICET-UNLP). Boulevard 120 S/N e/61 y 62 (B1902CHX). La Plata, Buenos Aires, Argentina claudiacll58@yahoo.com.ar.